Let's see...I played quite a few matches on Tuesday, ending up around 1100 then took a break and got to 1200 in less than 20 matches. Took it easy then tried for 1300 on Thursay(13:12 Elo you won by forfeit against Demon_DanteIB, IMPERIAL BLOOD (9-10): 1345 ELO). Tried to get higher on Fri/Say but it went downhill. So I guess to answer your question:
Well, that's probablly why you struggle when you hit 1300e+.
Same as me.
When you hit 1300 you lose more for a loss than you gain for a win, so you need to be scoring winning streaks to progress. If you can manage to progress to the point where you can achieve 1300e in 30-40 games consistently, you'll be closer to the level of skill acquired to push past your record.
That's what I'm currently aiming for, to get consistently effortless 1300e.