Do-It-Yourself, Repairs and Fixes

New house, was built/finished just under two years ago. I live in a dry climate, have been in my house for two years and only now discovered this. After some recent storms led to water in my window track I found my rear sliding windows have weep holes in the bottom, but they weren't draining.

After a lot of testing (filling the track with water, shop vac'ing it out, blower testing with air gun, suction with vacuum, etc.) I realized the weep holes in the interior of the window track and the weep holes on the exterior have no connection whatsoever. No water goes from inside to outside, and air blowing through exterior hole is felt through other exterior, and likewise with the interior, but nothing is going from interior to exterior. Water in the inside track will drain, until the portion underneath fills, and likewise, if I spray water in the exterior weep holes, nothing gets to the inside track, but it eventually comes out the exterior weep hole on the other side.

After some research, I found it's not uncommon for this to happen, it's a common defect with these sort of windows and I just drilled into the exterior weep hole with a 1/8 bit until it met the interior channel and sure enough, the water drains out as expected now. Put the window track back in, window back on, and tested pouring water in the track, it's draining perfectly now.

My only questions are, do I have anything to be concerned about? Since the climate here is normally very dry (high desert, Colorado) and moisture evaporates quickly, I'm not worried about mold, but is there anything to keep bugs from getting in through the weep holes? They're not covered in any way. Also, will there be any winter concerns with the cold in sub-zero temperatures or snow/ice build up?

Apologies if these are dumb questions, but I'd literally never heard of weep holes until this week, with discovering the issue. So not sure what potential issues they might have.