I just had a look at the Aldi site and found the machine you're referring to (see attached image).
1. Yes, its perfectly normal for some (clear) water to go into the drip tray and indicates the machine has a 3 way solenoid valve, which is a good thing. You might want to look into backflushing the machine once a month (google it - will require a blind disk or blind filter and back flushing cleaner).
2. With a cheaper machine like this one, I suspect there's not much you can do about uneven flow from the double spout (apart from checking machine is level). Looking at the photo, it appears to use the smaller 51mm diameter baskets (not 58mm commercial size) which don't hold a huge amount of coffee (weigh the grinds and if less than 15g...). I'd suggest keeping the use to one coffee per shot unless you like really weak coffee, as you won't get a cafe strength double shot from that machine anyway. I'd keep the double spout on the portafilter as its easier to tamp on the bench.
Are the filter baskets pressurised or are they standard? You can tell by holding it up to a light and if all the holes show light through from the inside "side" then its standard but if you only see one or a few holes from the outside, then it pressurised. Most likely the latter for that price machine but Aldi sometimes surprises with their gear. The fact the machine (claims to have) a PID is a good sign too.