Bonymaen shocked Carmarthen Athletic to win 14-13 at Five Fields and move off the bottom of Division One West.
Winger Robert Jones scored Bonymaen's only try, with Richard Cunniffe kicking their other nine points with two penalties and a drop goal.
Town rivals Carmarthen Quins faired much better, winning 32-6 at Cwmllynfell to extend their unbeaten run and remain top of the table.
In light of Bonymaen's win, Dunvant are now eight points adrift at the foot of the table following their 75-0 thrashing at second-place Tonmawr.
The Pitmen ran in 13 tries, with Ryan Baylis standing out as their hat-trick hero. He crossed three times during an emphatic victory, with Ben Davies going over twice as one of nine other Tonmawr try-scorers.
Whitland moved third after beating Llangennech 45-3, posting six tries including two for Lee Glanville.
Corus ran in four tries to beat Narberth 34-10, with full-back Rhys Williams kicking 11 points for the Steelmen. Felinfoel change places with Maesteg in sixth after they won 19-18 at Llynfi Road.
Merthyr stay top of Division One East with a predictable sixth victory of the camapign at bottom side Newport Saracens, who remain without a win so far this season. Full-back Adam Williams scored two of his team's six tries in the comfortable 43-7 win.
Newbridge remain second following their 33-16 success against Llanharan following two tries from Ceri Young.
Bargoed racked up a bonus point in their impressive 30-5 away win at Penallta keeping them hot on the trail of the top two.
Beddau lifted themselves clear of relegation with a 41-16 victory over Rumney. Matthew Evans scored two tries for Beaddau, the others came from Slater, Cleverly and Adams while Rhys Truelove racked up an impressive 16 points from the boot.
Gareth Price kicked three penalties to secure a 14-10 win for Blackwood over strugglers Ystrad Rhondda while Uwic scored four tries to beat Caerhilly 29-23 in a thrilling game at Virginia Park. Uwic held a convincing 17-5 lead at half-time but were left holding on at the end thanks to some reliable kicking from the boot of Colin Ashton.
Porthcawl recently received a WRU facilities grant and funding from Natwest RugbyForce in order to give their changing rooms a facelift. This came after receiving £10,000 in a WRU facilities grant last year to tarmac their car park. The improvements have already helped to make the club more accessible, not only for their own members and players but for the whole community.
The Welsh Rugby Union has launched a new, accredited Safeguarding and Protecting Children course - funded by the WRU and delivered in partnership with Sport Wales and the NSPCC - fo rugby club volunteers around Wales.
The SWALEC semi-final draws threw up some mouth-watering clashes in the Cup, Plate and Bowl as the 12 teams aim for the Millennium Stadium Finals Day. All the semi-finals are to be played on the weekend of April 12.
Welsh whistler Rhys Thomas continues to scale the heights of the game as he prepares to be an official in this weekend's Hong Kong Sevens tournament, undoubtedly the showpiece event on the World Series calendar.
Wales International Ian Evans and Wales and Lions legend Scott Quinnell swapped rugby balls for paint pots at Tonna during the RBS 6 Nations. They surprised club players with a special clubhouse makeover to launch NatWest RugbyForce 2014 - a programme developed in partnership with the WRU to make rugby clubs stronger businesses by improving and renovating their facilities with the support of volunteers and the local community.
Fresh from claiming the Bowl honours in Tokyo last Sunday, the Wales Sevens squad have settled into their routine as they prepare for this weekend's Hong Kong tournament where Iolo Evans is aiming high, as WRU TV's Graeme Gillespie discovers.
The Welsh Rugby Union has recently teamed up with Prostate Cymru to help the charity launch its latest campaign to raise awareness of the disease. Members of the Wales squad helped produce a short video and promotional material for the campaign titled 'The Best Defence - is to know the FACTS'.