Manager Ady Pennock admits a poor first-half performance proved costly in Dartford’s home Isthmian Premier defeat to early strugglers Bowers & Pitsea on Saturday. Former Dartford Academy midfielder Alfie Evans netted twice in the first 30 minutes for the Essex side against his former club. The Darts pulled one back through forward Callum Jones late on and the away team had defender Valckx Fernandes sent off in 10 minutes of stoppage time but it finished 2-1 as Bowers & Pitsea moved off the bottom of the table. Pennock, who felt Dartford should have been awarded a penalty early in the second ha…