A small explanation for ufw.log needed!

Hello and merry Xmas!

I have these rules:
sudo ufw status verbose
Status: active
Logging: on (low)
Default: deny (incoming), allow (outgoing)
New profiles: skip

To Action From
-- ------ ----
22/tcp ALLOW IN Anywhere
80/tcp ALLOW IN Anywhere
3306/tcp ALLOW IN Anywhere

and I get this kind og logs:

Dec 30 11:37:04 xxx kernel: [xxx] [UFW BLOCK] IN=eth0 OUT= MAC=xxx SRC=62.75.10.32 DST=xxx LEN=1492 TOS=0x18 PREC=0x20 TTL=60 ID=52947 DF PROTO=TCP SPT=80 DPT=36341 WINDOW=125 RES=0x00 ACK URGP=0

Dec 30 11:00:51 xxx kernel: [xxx] [UFW BLOCK] IN=eth0 OUT= MAC=xxx SRC=192.168.2.1 DST=xxx LEN=337 TOS=0x00 PREC=0x00 TTL=4 ID=1550 PROTO=UDP SPT=1900 DPT=54415 LEN=317

A network lookup of 62.75.10.32 gives me sth relevant to my ISP and 192.168.2.1 is my rooter of course.

I just wanted to know if that is normal behavior, cause I don't know much about lptables. Other than that I do not have any problems with my network connection, nor slow downs.

Thank you!
Mike