Hi, welcome to OSM!

Many of the cycle lanes you added were already mapped using the cycleway tag on the road.

There are two current approaches to mapping cycle paths: https://wiki.openstreetmap.org/wiki/Key:cycleway and https://wiki.openstreetmap.org/wiki/Tag:highway%3Dcycleway
Please read those pages to understand their intended use, and pros/cons of each approach. Obviously choose whichever approach you feel is best for the situation at hand, but understand the meaning of each, and also that applying both approaches, like has inadvertently happened here results in duplication.

Also, many of the cycle lane/track lines you've drawn (e.g. https://www.openstreetmap.org/way/1372763000) aren't continuous cycle lane/tracks in reality - there is actually no cycle lane at all for part of Sandyford Road.
The cycleway tags already added to the road reflects this intermittent and varying nature of the cycle lane/track, e.g https://www.openstreetmap.org/way/108345245

It's unfortunate that the iD editor doesn't give a visual indication of cycleway presence on a road with cycleway tags on it. I made the exact same mistake when I first contributed to OSM.

I hope this all makes sense!