If you were seeing an excessive number of errors, then that'd be an issue, but you're not, so... no, not really. No need to be concerned, as it's perfectly normal for there to be some errors on the line (that's one of the things Interleave helps compensate, which lets you run at higher overall speeds with slightly higher ping time). If it does get out of hand, let us know and we can adjust the line settings to compensate.
The tech you worked with today was Esteban, btw.